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71804 LEGO Ninjago Arin's Battle Mech thumbnail image

71804 LEGO Ninjago Arin's Battle Mech
Images 6Description 
71804 LEGO Ninjago Arin's Battle Mech
  • Arin's Battle Mech thumbnail
  • Arin's Battle Mech thumbnail
  • Arin's Battle Mech thumbnail
  • Arin's Battle Mech thumbnail
  • Arin's Battle Mech thumbnail
  • Arin's Battle Mech thumbnail

LEGO 71804 Arin's Battle Mech is a Ninjago set valued at $16 for new and sealed sets, up 6% from an original retail price of $14.99. The set retired in December 2025 with annual appreciation averaging 7.24% since. Used copies are valued between $12 and $14 depending on condition. Secondary market prices for new and sealed sets typically fall between $15 and $19.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Arin's Battle Mech since December 2025. Medium accuracy
LEGO 71804 Arin's Battle Mech is a Ninjago Dragons Rising Season 2 set released in 2024, containing 104 pieces and 2 minifigures. This 4+ set builds a posable battle mech for Arin equipped with a large sword and a rotating blade, opposed by a Wolf Mask Warrior with a glider featuring posable wings, a disc shooter, and twin spears. Additional builds include a brick-built crystal cave with a magic mallet and a weapons rack holding two golden katanas. The minifigures are Arin with a katana and a Wolf Mask Warrior with a sword.

A new and sealed Arin's Battle Mech is currently valued at around $16, with annual growth of approximately 7%, which is lower than other Dragons Rising Season 2 sets. The average used price is $13 for those in good overall condition. The 2 included minifigs account for approximately 38% of the set's total value. New and sealed listings currently range from $16 to $21. The set was available for 23 months, from January 2024 to December 2025.
All regions

For Sale (New/Sealed)

 (US) Sealed Lego Ninjago Dragons Rising Arin's Battle Mech Set (71804)
BrickEconomy Choice
$11.55
(US) Ninjago Arin's Battle Mech 71804 Toy Building Kit 104 pcs $11.99
-24.4%
(NL) 71805 Jays Mech Battle Pack - [ New. ] $12.43
-21.6%
(US) NINJAGO: Arin's Battle Mech (71804) $13.99
-11.8%
(US) BrickLink store Chelle's Bricktique $14.99
-5.5%
(US) NINJAGO Dragons Rising Arin's Battle Mech 71804 Complete Set, 104 Pieces $15.00
-5.4%
(US) NEW IN BOX SEALED NINJAGO SET 71804 ARIN'S BATTLE MECH $15.00
-5.4%
(US) BrickLink store Go Brick or Go Home $15.00
-5.4%
(NO) BrickLink store BrickShop Norway $15.05
-5.1%
(SI) BrickLink store 3 BRICKS sale -15% $15.20
-4.2%
(CA) 71804 Ninjago Arin's Battle Mech 104 Pcs Building Toy Set New $15.52
-2.1%
(US) NINJAGO Dragons Rising Arins Battle Mech 71804 NEW -Retired- $15.99
+0.8%
(US) Ninjago 71804 Arin's Battle Mech $15.99
+0.8%
(US) Arin's Battle Mech #71804 - Sealed LEGO Ninjago Dragons Rising 4+ / 104 pcs $15.99
+0.8%
Show 25 more listings

Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the past three months of new/sealed 71804 Arin's Battle Mech.

Sale Trends

This chart shows the sales trends (number sold) of new/sealed 71804 Arin's Battle Mech.

Sets in Ninjago / Dragons Rising Season 2

71814 Tournament Temple City

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 3,489 / 13
Availability Retail (Retiring soon)
71814 LEGO Ninjago Tournament Temple City
Retail $249.99
Available at retail
Retiring soon

71822 Source Dragon of Motion

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,716 / 6
Availability Retired
71822 LEGO Ninjago Source Dragon of Motion
Retail $149.99
Value $227.23
Growth  +51.5%

71819 Dragon Stone Shrine

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,212 / 6
Availability Retired
71819 LEGO Ninjago Dragon Stone Shrine
Retail $119.99
Value $99.98

71813 Wolf Mask Shadow Dojo

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,190 / 8
Availability Retired
71813 LEGO Ninjago Wolf Mask Shadow Dojo
Retail $119.99
Value $147.16
Growth  +22.6%

71821 Cole's Titan Dragon Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,055 / 1
Availability Retired
71821 LEGO Ninjago Cole's Titan Dragon Mech
Retail $99.99
Value $173.90
Growth  +73.9%

71818 Tournament Battle Arena

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 659 / 6
Availability Retired
71818 LEGO Ninjago Tournament Battle Arena
Retail $49.99
Value $64.69
Growth  +29.4%

71812 Kai's Ninja Climber Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 623 / 4
Availability Retired
71812 LEGO Ninjago Kai's Ninja Climber Mech
Retail $69.99
Value $100.00
Growth  +42.9%

71820 Ninja Team Combo Vehicle

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 576 / 6
Availability Retired
71820 LEGO Ninjago Ninja Team Combo Vehicle
Retail $89.99
Value $83.37

71809 Egalt the Master Dragon

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 532 / 5
Availability Retired
71809 LEGO Ninjago Egalt the Master Dragon
Retail $69.99
Value $80.89
Growth  +15.6%

71808 Kai's Elemental Fire Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 322 / 4
Availability Retail (Retiring soon)
71808 LEGO Ninjago Kai's Elemental Fire Mech
Retail $29.99
Available at retail
Retiring soon

71811 Arin's Ninja Off-Road Buggy Car

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 267 / 4
Availability Retired
71811 LEGO Ninjago Arin's Ninja Off-Road Buggy Car
Retail $49.99
Value $50.43
Growth  +0.9%

71817 Lloyd's Elemental Power Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 253 / 3
Availability Retired
71817 LEGO Ninjago Lloyd's Elemental Power Mech
Retail $19.99
Value $41.01
Growth  +105.2%
Annual growth 26.1%

71806 Cole's Elemental Battle Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 235 / 2
Availability Retired
71806 LEGO Ninjago Cole's Elemental Battle Mech
Retail $19.99
Value $34.43
Growth  +72.2%

71807 Sora's Elemental Tech Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 209 / 2
Availability Retired
71807 LEGO Ninjago Sora's Elemental Tech Mech
Retail $19.99
Value $29.99
Growth  +50.0%

71810 Young Dragon Riyu

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 132 / 3
Availability Retired
71810 LEGO Ninjago Young Dragon Riyu
Retail $14.99
Value $27.99
Growth  +86.7%

71815 Kai's Source Dragon Battle

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 120 / 4
Availability Retired
71815 LEGO Ninjago Kai's Source Dragon Battle
Retail $37.99
Value $47.88
Growth  +26.0%
Annual growth 22.0%

71816 Zane's Ice Motorcycle

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 84 / 1
Availability Retired
71816 LEGO Ninjago Zane's Ice Motorcycle
Retail $9.99
Value $12.18
Growth  +21.9%

71805 Jay's Mech Battle Pack

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 78 / 4
Availability Retired
71805 LEGO Ninjago Jay's Mech Battle Pack
Retail $9.99
Value $19.99
Growth  +100.1%

30675 Tournament Training Ground

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 55 / 2
Availability Retired
30675 LEGO Ninjago Tournament Training Ground
Retail $4.99
Value $10.42
Growth  +108.8%
Annual growth 18.0%

My Collection

Arin's Battle Mech Reviews

25 reviews
4.6
Collectors
Investors
“Arin’s Battle Mech is a set that is clearly for the younger builders, and there’s no fault in that. For a set with little parts, getting a mech, spinning golden blade shield, hidden trove and printed shield is great. The shield represents the ‘Gong of Shattering’, with the... More small hammer build behind the purple opalescent rock I believe to be the Magic Mallet.”
Full review at www.brickbanter.com
BrickEconomy Member Review
“Aaron’s Battle Mech is a simple and sturdy 4+ set, ideal for younger builders learning the basics of LEGO. The set includes two minifigures: Aaron, with a basic but appealing design, and a Wolf Mask Warrior, a recurring villain in the Dragons Rising wave. The mech features a posable design with a katana and shield, while the small flyer adds playability with shooting functionality.”
 

About Ninjago Dragons Rising Season 2

LEGO Ninjago, also known as Ninjago: Masters of Spinjitzu, theme was introduced in 2011 and included sets that are based off of original storylines, a TV series and The LEGO Ninjago Movie, a movie based on the theme. The main premise of the Ninjago universe is based around six teenage Ninja, Kai, Jay, Cole, Zane, Nya, and Lloyd, who have been trained by their master Sensei Wu, fighting forces of evil to protect the land of Ninjago.

Dragons Rising Season 2 was introduced in 2024 and currently consists of 20 sets. As of today, 71822 Source Dragon of Motion is the most valuable Dragons Rising Season 2 set with an estimated new/factory sealed value of $227.
Summary
Ninjago Dragons Rising Season 2 Arin's Battle Mech set 71804 was released in January 2024, retailing for $15, but has since been retired. New, unopened Arin's Battle Mech sets are valued at $16, while used sets can be found for $13 in good condition.
Read more
Arin’s Battle Mech (71804) ninja toy lets kids aged 4+ learn to build as they join in with their ninja heroes’ attempt to save their dragon friends. This role-play action toy includes an impressive mech figure to inspire kids to recreate exciting adventures from season 2 of the NINJAGO® Dragons Rising TV show.

This LEGO® set comes with 2 minifigures: Arin with a katana accessory and a Wolf Mask Warrior with a sword accessory. Arin fits in the posable mech figure, which wields a large sword androtating blade, while the Wolf Mask Warrior can fly in a glider that has posable wings, a disc shooter and 2 spears. There’s also a brick-built crystal cave with a magic mallet inside and a weapons rack with 2 golden katana sword accessories.

This ninja toy has been designed to provide a fun experience for children aged 4+ who are discovering the joy of building with LEGO bricks. The set comes with a Starter Brick: a partly constructed base that gets kids building quickly and with...
Description provided by LEGO©